Answer:
a is gonna be 3
Step-by-step explanation:
Y = mx + b
slope (m) = - 3
(6,-2) ... x = 6 and y = - 2
sub and find b, the y int
-2 = - 3 (6) + b
-2 = - 18 + b
-2 + 18 = b
16 = b
so ur equation for this line is : y = - 3x + b
(a,7) ... so y = 7 ... " a " is gonna be x
y = - 3x + b
7 = - 3x + 16
7 - 16 = - 3x
- 9 = - 3x
-9/-3 = x
